Mechanics of Materials (MindTap Course List)
9th Edition
ISBN: 9781337093347
Author: Barry J. Goodno, James M. Gere
Publisher: Cengage Learning
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Textbook Question
Chapter 5, Problem 5.6.9P
A floor system in a small building consists of wood planks supported by 2-in. (nominal width) joists spaced at distance s and measured from center to center (see figure). The span length L of each joist is 12 ft, the spacing s of the joists is 16 in., and the allowable bending stress in the wood is 1250 psi. The uniform floor load is 120 lb/ft", which includes an allowance for the weight of the floor system itself.
- Calculate the required section modulus S for the joists, and then select a suitable joist size (surfaced lumber) from Appendix G, assuming that each joist may be represented as a simple beam carrying a uniform load.
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A floor system in a small building consistsof wood planks supported by 2-in. (nominal width)joists spaced at distance s and measured from centerto center (see figure). The span length L of eachjoist is 12 ft, the spacing s of the joists is 16 in., andthe allowable bending stress in the wood is 1250 psi.The uniform floor load is 120 lb/ft2, which includesan allowance for the weight of the floor system itself.(a) Calculate the required section modulus S for thejoists, and then select a suitable joist size (surfacedlumber) from Appendix G, assuming thateach joist may be represented as a simple beamcarrying a uniform load.(b) What is the maximum floor load that can beapplied to your final beam selection in part (a)?
Pravinbhai
Fig 1 and 2 pictured with part A
calculate the magnitude of the shear stress at the point due to internal shear on the section.
calculate the combined normal stress at the point due to internal normal force and the internal bending moment of the section.
Chapter 5 Solutions
Mechanics of Materials (MindTap Course List)
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A simple beam with an overhang supports a uniform...Ch. 5 - A hollow steel box beam has the rectangular cross...Ch. 5 - A hollow aluminum box beam has the square cross...Ch. 5 - The T-beam shown in the figure has cross-sectional...Ch. 5 - Calculate the maximum shear stress tmax. in the...Ch. 5 - A prefabricated wood I-beam serving as a floor...Ch. 5 - A welded steel gird crhaving the erass section...Ch. 5 - A welded steel girder having the cross section...Ch. 5 - A wood box beam is constructed of two 260 mm × 50...Ch. 5 - A box beam is constructed of four wood boards as...Ch. 5 - Two wood box beams (beams A and B) have the same...Ch. 5 - A hollow wood beam with plywood webs has the...Ch. 5 - A beam of a T cross section is formed by nailing...Ch. 5 - The T-beam shown in the figure is fabricated by...Ch. 5 - A steel beam is built up from a W 410 × 85 wide...Ch. 5 - The three beams shown have approximately the same...Ch. 5 - Two W 310 × 74 Steel wide-flange beams are bolted...Ch. 5 - A pole is fixed at the base and is subjected to a...Ch. 5 - 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